linux-kernel - [PATCH 3.5 012/103] atm: idt77252: fix dev refcnt leak

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Message-Id: <1387304012-23805-13-git-send-email-luis.henriques@canonical.com>
Date:	Tue, 17 Dec 2013 18:12:01 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Ying Xue <ying.xue@...driver.com>,
	"David S. Miller" <davem@...emloft.net>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.5 012/103] atm: idt77252: fix dev refcnt leak

3.5.7.28 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ying Xue <ying.xue@...driver.com>

commit b5de4a22f157ca345cdb3575207bf46402414bc1 upstream.

init_card() calls dev_get_by_name() to get a network deceive. But it
doesn't decrease network device reference count after the device is
used.

Signed-off-by: Ying Xue <ying.xue@...driver.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/atm/idt77252.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index 8974bd2..81845fa 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -3513,7 +3513,7 @@ init_card(struct atm_dev *dev)
 	tmp = dev_get_by_name(&init_net, tname);	/* jhs: was "tmp = dev_get(tname);" */
 	if (tmp) {
 		memcpy(card->atmdev->esi, tmp->dev_addr, 6);
-
+		dev_put(tmp);
 		printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
 	}
 	/*
-- 
1.8.3.2

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